Rotary pump



Aug. 16, 1932- A. HUDSON ROTARY PUMP Filed July 26. 1930 2 Sheets-Sheet1 INVENTO'R, Iii bu. rl/adsan,

ATTOfiNEY Aug. 16, 1932.

A. HUDSON ROTARY PUMP Filed July 25, 1930 2 Sheets-Sheet 2 r'-- "I- "'r"INVENTOR, lqriliu r/fi i- ATTORNEY UNITED STATES PATENT OFFICE nnrnunnunsou, or cmr'rou, NEW man! noun? rum Application filed July as, 1930.Serial no. 470,898. I

This invention relates to rotary machines, Figs. 3 and spare; side as ntelevations as fluid pumps or engines, in which the rotor of thementioned annul cture; has piston blades movable back and forth Fig. 5shows two blades and certain pins through its periphery and extendinglengthintervening between them;

5 wise of its axis and the cylinder has an abut- Fig. 6 is a section online 66, Fig. 7; 5

ment or partition to separate its inlet and Fig. 7 is a vertical sectionof another form outlet from each other and means to cam the 0f themachine; blades inward in order to pass the abutment. Figs. 8 and 9 areside and front elevations Following the usual custom I depend, acof itsannular structure; and

lo cording to the present invention, on some Figs. 10 and 11 are insideand edgewise 55 force to hold the blades against the abutviews of thecylinder heads for this form of ment and its camming-means especially tothe mach ne. attain good sealing contact against leakage Figs. 1 to 5:The cylmder or casing is from the inlet to the outlet direct, andinstead rmed by the cylinderproper 1 and its two 15 of forming thestructure including the abutend walls or heads 2, all bolted together asment and cam means as usual with a pair (or shown-in Fig. 2; the cyhnderproper has the opposite pairs in case the machine is resu l openings aand 6, either of which may versible, as usual) of tapering cam horns, Ibe the inlet and the other the outlet. form it as an apertured annularstructure 3is the substantially cylin ri l r r fixed against which theblades under the centrifuon shaft 4. journaled in the casing heads 2 galaction bear continuously, this structure and 5 its piston blades ormembers slidable being preferably split and lap-jointed in radially inslots 6 'in the rotor and, when some plane angularly related to thediameter the latter is rotated, held at their outward occupied by theabutment whereby the seclimit (as will appear) by centrifugal force.

2 tion thereof having the abutment may be ad- The mentioned annularstructure comprises justed toward the other section to take up heabutment 7,'t gS 8 nne her the wear produced by theblades and occurby,and prefer bly & rv w 9 connectms' ring, as it always does, principallyat the the rings opposite the abutment; in'fact,with' Y abutment. Wherecam means having horns the web presentthe structure is in effect a 30 ori le t j ti th lik h t sleeve, with opposite apertures. 10, eachacterized by terminals or ends are used there bounded by the abutment,web and two rings. is always an attendant interference of the vThe g3111s 6"?) are spllt at 11 Into d ith th bl d hi h di t b th l t. twosections one including-the abutment and ters action and also produces ahammering. the other the web, when P 'F Q and Pr f Besides, myconstruction permits a lining as ably m a sm Plane whlch 1S perpendlpuan element distinct from the abutment and ii: g fififi ii ggg ifi fizggfiz i f gig 32 3 3;: Egg 5% i s igfi gzfiz g z actually lapo1nts whoselapplng surfaces 12 are in planes 'an ularly related to the axis of 40 gzfigga y fthe mah 1ne1sgreat the structure. The outer and inner surfaces86 of the structure are cylindrical, but the inner IQthQ fl j a surfaceis oifset eccentrically in a direction g- 1 swtlfm 011 111359 5-1; F 552 from the abutment or so'that at the abutment Fig. 2 1s a vertlcalSectlOlI 03550116 form 0 its thickness is greatest. The annular struc-45 the machine in the plane-ofits rotor axis; ture fits the cylinder andis kept from rotative displacement by a rib 13 on the abutment fitting agroove 14 in the cylmder, the cylinder having adjusting screws 15 tobear against this rib. The ends of the section having the abutment arebeyond the axis of the cylinder relatively to the abutment, wherefore,since the ends of sa1d sectlon bear against the cylinder, and if, ofcourse, the 1nner surfaces of the two sections are initially flush, whenadjustment of the sectlon having the abutment toward the other sectionoccurs this flush relation will be preserved as an incident of the endsof the former section being pressed together by the cylinder, as ofcourse would not result if the plane of division were between theabutment and said axis.

It will be understood that when the machine is operating the fluid movesfrom the inlet through one aperture 10, around the rotor (and between itand web 9, if present) and then through the other aperture 10 to theoutlet, direct communication from the inlet to the outlet being cut offby the abutment 7. The rings of course, due to the eccentricity of theirinner surfaces, which brings them flush with that of the abutment, camthe blades inward so as to pass the abutment, they thereupon returning(in short, always remaining in contact with the rings) as an incident ofcentrifugal force. The web 9 affords a surface against which in theworking portion of the revolution of each blade the blade wipes insealing contact, so that in that region there can be no escape of fluidpast the blades. In short the annular structure not only avoids thementioned interference between its cams and the blades whichcharacterizes the usual construction but it includes as a part thereofthat surface (to wit, of web 9) which in a portion of the revolution ofa blade coacts with the latter to seal off from each other the fluidbodies relatively ahead of and behind the blade; usually a. lining isresorted to to aflord such surface, but my construction eliminates thelining as an element distinct from the abutment and cam device. If wearoccurs which would allow leakage between the blades and the abutmentthis may be taken up by adjustment of the screws 15, which sets thesection of the annular structure having the abutment toward the othersection.

To insure positive outward displacement of the blades I providediametric holes 16 in the rotor and in these place pins 17 which reachfrom each blade to the diametrically opposite blade; these abut theblades, leaving each free of the other to move outwardly undercentrifugal force. If any blade tends. to stick in its slot the inwardcamming action on the other insures its outward movement.

Figs. 6 to 11: In this form the parts 1a to 154: are all substantiallythe same as the cor-- respondin parts 1 to 15 in Figs 1 to 5 exceptingas f0 ows: These views show that the inner surface of the annularstructure need not necessarily be truly circular, as in Figs. 1 to 5.They also show the means for positively moving the blades outwardly ascomprising cam surfaces 18w which may be formed in endless grooves 18 inthe inner faces of the heads 2a and studs 19 on the ends of the bladesarranged to wipe against said surfaces. It will be understood that theouter sides of the grooves do not oppose centrifugal force acting on theblades to hold them in sealing contact with the web 9a.

Havin thus fully described my invention what I c aim is:

1. A rotary machine of the class described comprising a cylinder havingin its cylindrical wall a fluid intake and outlet a rotor revoluble inthe cylinder and havlng a piston movable toward and from and normallyurged toward said wall of the cylinder, an annular structure extendingaround the rotor within the cylinder and outwardly abutted by the pistonand apertured for passa e of fluid from the intake to the outlet arounthe rotor and having an abutment opposing direct fluid flow from theinlet to the outlet and having its inner surface formed to cam thepiston past the abutment, said structure being split in two sections ina plane angularly related to the diametric plane occupied by theabutment and said sections having their ends lapping and flush with eachother at the inner periphery of said structure, and means to adjust thesection having the abut- 1 ment bodily toward the other section.

, 2. A rotary machine of the class described comprising a cylinderhaving in its cylindrical wall a fluid intake and outlet, a rotorrevolublein the cylinder and having a piston movable toward and from andnormally urged toward said wall of the cylinder, an,

annular structure extending around the rotor within the cylinder andoutwardly abutted by the piston and apertured for passage of fluid fromthe intake to the outlet around the rotor and having an abutmentopposing direct fluid flow from the inlet to the outlet and having itsinner surface formed to cam the piston past the abutment, said structurebeing split. in two sections in a plane angularly, related to thediametric plane occupied by the abutment and the section having theabutment having' its ends spaced from the ends of the other section, andmeans to adjust the section having the abutment bodily toward the othersection.

3. A rotary machine of the class described comprising a cylinder havingin its cylindri-' cal wall a fluid intake and outlet, a rotor revolublein the cylinder and having a piston movable toward and from and normallyurged toward said wall of the cylinder, 'an

annular structure extending around the rotor within the cylinder andoutwardly abutted by the piston. and apertured for passage of fluid fromthe intake to the outlet around the rotor and having an abutmentopposing direct fluid flow from the inlet to the outlet and having itsinner surface formed to cam the piston past the abutment, said structurebeing split in two sections in a plane angularly related to thediametric plane occu led by the abutment and having the ends the sectionhaving the abutment beyond the axis of the cylinder relatively to theabutment and bearing against said wall, and means to adjust the sectionhaving the abutment bodily toward the other section. I

In testimony whereof I afiix my signature. ARTHUR HUDSON.

